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    <title>mtlb_isletter</title>
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    <center>M2SCI function</center>
    <div align="right">Last update : 29/07/2004</div>
    <p>
      <b>mtlb_isletter</b> - Matlab isletter emulation function</p>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>There is no Scilab equivalent function for Matlab <tt>
        <b>isletter</b>
      </tt> and equivalent instructions are quite ugly, so 
    <tt>
        <b>mfile2sci</b>
      </tt> uses <tt>
        <b>mtlb_isletter(A)</b>
      </tt> to replace <tt>
        <b>isletter(A)</b>
      </tt>. If you want to have a
    more efficient code it is possible to replace <tt>
        <b>mtlb_isletter</b>
      </tt> calls:
    </p>
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        <b></b>
        <dd>
          <li>
            <b>
              <font color="maroon"></font>
            </b>
        If <tt>
              <b>A</b>
            </tt> is not a character string
        <tt>
              <b>tf = mtlb_isletter(A)</b>
            </tt> may be replaced by <tt>
              <b>tf = zeros(A)</b>
            </tt>
          </li>
          <li>
            <b>
              <font color="maroon"></font>
            </b>
        If <tt>
              <b>A</b>
            </tt> is a character string
        <tt>
              <b>tf = mtlb_isletter(A)</b>
            </tt> may be replaced by
	<tt>
              <b>tf = (asciimat(A)&gt;=65&amp;asciimat(A)&lt;=90)|(asciimat(A)&gt;=97&amp;asciimat(A)&lt;=122)</b>
            </tt>
          </li>
        </dd>
      </dd>
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    <p>Caution: <tt>
        <b>mtlb_isletter</b>
      </tt> has not to be used for hand coded functions.</p>
    <h3>
      <font color="blue">Authors</font>
    </h3>
    <dl>
      <dd>
        <b></b>V.C.</dd>
    </dl>
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